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Speleology in Kazakhstan

Shakalov on 04 Jul, 2018
Hello everyone!   I pleased to invite you to the official site of Central Asian Karstic-Speleological commission ("Kaspeko")   There, we regularly publish reports about our expeditions, articles and reports on speleotopics, lecture course for instructors, photos etc. ...

New publications on hypogene speleogenesis

Klimchouk on 26 Mar, 2012
Dear Colleagues, This is to draw your attention to several recent publications added to KarstBase, relevant to hypogenic karst/speleogenesis: Corrosion of limestone tablets in sulfidic ground-water: measurements and speleogenetic implications Galdenzi,

The deepest terrestrial animal

Klimchouk on 23 Feb, 2012
A recent publication of Spanish researchers describes the biology of Krubera Cave, including the deepest terrestrial animal ever found: Jordana, Rafael; Baquero, Enrique; Reboleira, Sofía and Sendra, Alberto. ...

Caves - landscapes without light

akop on 05 Feb, 2012
Exhibition dedicated to caves is taking place in the Vienna Natural History Museum   The exhibition at the Natural History Museum presents the surprising variety of caves and cave formations such as stalactites and various crystals. ...

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That geological section is a vertical section through a sequence of rock masses or strata [16].?

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KarstBase a bibliography database in karst and cave science.

Featured articles from Cave & Karst Science Journals
Chemistry and Karst, White, William B.
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Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
See all featured articles from other geoscience journals

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Your search for vietnam (Keyword) returned 28 results for the whole karstbase:
Showing 16 to 28 of 28
Test of a distributed modelling approach to predict flood flows in the karst Suoimuoi catchment in Vietnam, 2005, Liu Y. B. , Batelaan O. , De Smedt F. , Huong N. T. , Tam V. T. ,
The major obstacles for modelling flood processes in karst areas are a lack of understanding and model representations of the distinctive features and processes associated with runoff generation and often a paucity of field data. In this study, a distributed flood-modelling approach, WetSpa, is modified and applied to simulate the hydrological features and processes in the karst Suoimuoi catchment in northwest Vietnam. With input of topography, land use and soil types in a GIS format, the model is calibrated based on 15 months of hourly meteorological and hydrological data, and is used to Simulate both fast surface and conduit flows, and groundwater discharges from karst and non-karst aquifers. Considerable variability in the simulation accuracy is found among storm events and within the catchment. The simulation results show that the model is able to represent reasonably well the stormflows generated by rainfall events in the study catchment

Study of cavernous underground conduits in Nam La (Northwest Vietnam) by an integrative approach, 2005, Tam V. T. , De Smedt F. , Batelaan O. , Hung L. Q. , Dassargues A. ,
This paper presents the result of an investigation of underground conduits, which connect the swallow holes and the resurgence of a blind river in the tropical, highly karstified limestone Nam La catchment in the NW of Vietnam. The Nam La River disappears underground in several swallow holes near the outlet of the catchment. In the rainy season this results in flooding upstream of the sinkholes. A hypothesis is that the Nam La River resurges at a large cavern spring 4.5 km east of the catchment outlet. A multi-thematic study of the possible connections between the swallow holes and the resurgence was carried out to investigate the geological structure, tectonics, cave structure analysis and discharge time series. The existence of the underground conduits was also tested and proven by tracer experiments. On the basis of a lineament analysis the location of the underground conduits were predicted. A remote sensing derived lineament-length density map was used to track routes from the swallow holes to the resurgence, having the shortest length but highest lineament density. This resulted in a plan-view prediction of underground conduits that matches with the cave and fault development. The functioning of the conduits was further explained by analysing flooding records of a nearby doline, which turns out to act as a temporary storage reservoir mitigating flooding of the catchment outlet area

Karst and Caves of Ha Long Bay, 2005, Waltham, T.

A simplified methodology for mapping groundwater vulnerability and contamination risk, and its first application in a tropical karst area, Vietnam, 2006, Vu Thi Minh Nguyet, Nico Goldscheider,

Tracer tests, hydrochemical and microbiological investigations as a basis for groundwater protection in a remote tropical mountainous karst area, Vietnam, 2006, Vu Thi Minh Nguyet, Nico Goldscheider,

New palaeontological assemblage, sedimentological and chronological data from the Pleistocene Ma U'Oi cave (northern Vietnam), 2006, Bacon Am, Demeter F, Rousse S, Long Vt, Duringer P, Antoine Po, Thuy Nk, Mai Bt, Huong Ntm, Dodo Y,
This paper describes recent material gathered during the second fieldwork at Ma U'Oi in November 2002 by a Vietnamese-French-Japanese team. The Ma U'Oi cave, located in the province of Hoa Binh (60 km SW from Hanoi), northern Vietnam, belongs to a karstic network developed in Triassic dark-grey limestones.The cave is filled with coarse-grained breccias containing numerous fossil remains, partially preserved at several loci inside the cave (wall, vault and ground). We describe new teeth which confirm the occurrence of mammal taxa already mentioned at Ma U'Oi (Bacon et al., 2004)[Bacon, A-M., Demeter, F., Schuster, M., Long, V.T., Thuy, N.K., Antoine, P-O., Sen, S., Nga, H.H., Huong, N.T.M., 2004. The Pleistocene Ma U'Oi cave, northern Vietnam: palaeontology, sedimentology and palaeoenvironments. Geobios 37, 305-314], while others, mainly microvertebrates, emphasize the occurrence of new species for the Pleistocene of Vietnam. We report here, for the first time, the occurrence of these microvertebrates of different groups (primates, rodents, insectivores, small reptiles and amphibians) in the faunal assemblage. Among mammal taxa, the presence of one more hominid affiliated to archaic Homo is also attested by our findings. U/Th dating carried out on 2 samples extracted from breccia speleothems confirms the biochronological estimate, with fossiliferous fillings ranging from late Middle Pleistocene to Late Pleistocene

Hongs of southeast Asia, 2007, Price, Liz And Tony Waltham.
Hongs are dolines invaded by the sea within fengcong karst, and are commonly accessible only through caves within the tidal zone. The best of them are in the limestone islands of Phang Nga and Ha Long Bays, in Thailand and Vietnam. Isolated within rugged and forested terrains, hong lagoons can be very beautiful sites. The sea-level caves that lead into them either pre-date the hongs or developed as a result of their presence.

MANAGING AQUIFER RECHARGE (MAR): ASSESSMENT OF GROUNDWATER RESOURCES IN THE SAND, 2007, Kim Thoa Nguyen Thi, Giuseppe Arduino, Paolo Bono, Nguyen Van Giang, Phan Thi Kim Van, Bui Tran Vuong, Dinh Thi Bich Lieu, Brun Clarissa, Chiara Fiori, Fabrizio Gherardi, Francesca Zucco
Extensive geophysical, hydrological and isotopic investigations, including drilling campaigns, long term pumping tests and continuous monitoring of ground water levels in 4 monitoring wells, show that the sand dunes formation is characterized by the occurrence of an unconfined porous aquifer, of variable thickness (40 to 60 m), emerging at ground level in depressed morphological areas (20 to 30 m a.s.l.) where it forms intradune wetlands or natural reservoirs (lakes), and discharging directly to the sea through single springs (up to 200 l/s), linear springs and mostly by diffuse seepage along the shoreline (approximate discharge equal to 30 l/s per km). Hydrochemical and isotopic characterization of surface and groundwater in different periods, shows that the sand dunes aquifers, with electrical conductivity ranging from 50 to 500 μS/cm, are composed of different water types, characterized by complex mixing processes. The site chosen for the artificial recharge, where a 162 days pumping test has been carried out, proved that the use of the bank filtration technique has considerably improved the quality of water, originally highly contaminated by colibacteria. The well field developed within the present project is now capable of supplying 220 m3/day of good water quality to the Hong Phong community, recurrently affected by severe droughts. This project is part of UNESCO-IHP (International Hydrological Programme) and IMET (Italian Ministry for the Environment and Territory) Water Programme for Africa, Arid and Water Scarce zone - Viet Nam component funded by IMET. Funds for the Viet Nam project were also made available from the Vietnamese Government, and from ICSU, the International Council for Science and UNESCO Office Jakarta.

Atlas of the Great Caves and the Karst of Southeast Asia , 2010,

Each country is presented in detail including topographic and karst occurrence maps as well as a description of the geological settings, the history of speleological exploration, a detailed list of the longest and deepest caves (incl. surveys), a list of useful addresses and an in-depth bibliography. Some countries also have maps showing the administrative divisions and other relevant thematic maps.

Structural controls on the occurrence and morphology of karstified assemblages in northeastern Vietnam: a regional perspective, 2011, Tran Hai Thanh, Dang Bat Van, Ngo Chi Kim, Hoang Que Dinh, Nguyen Quyen Minh

Monadnocks of the Mekong delta: character, caves and evolution, 2011, Kiernan, Kevin

Isolated limestone hills and towers near the Gulf of Thailand coast, and granitic monadnocks that extend further inland, protrude through alluvial silts of the Mekong River delta in Vietnam and Cambodia. The form of the granitic monadnocks is guided by bedrock geometry and some exhibit extensive boulder mantles residual from deep weathering within which large boulder cave complexes occur, together with underground stream systems that feed permanent springs. The limestone hills vary in form according to differences in structure, rock purity and hill-base topographic setting and contain vertically-developed vadose invasion caves and basal floodwater stream caves. Evolution of the present day hillbase and stream cave morphology has been influenced by changes in the base level of vadose activity that have been related to changes in relative sea level, most recently as the Mekong delta has formed during the Holocene.

Preliminary study for the adaptation of the "Heaven's Cave" for tourist purposes (Phong Nha-Ke Bang national park, Vietnam) , 2012, Debevec Bogdan, Knez Martin, Kranjc Andrej, Pahor Marko, Prelovek Mitja, Semeja Ale, Slabe Tadej

Heaven’s Cave is located in the centre of the Phong Nha-Ke Bang national park, about 500  km southern from the Vietnamese capital and 40 km from the city of Dong Hoi. Phong Nha-Ke Bang national park is protected also as a UNESCO world heritage site. Due to weak economic situation in this region as a result of lack of natural resources, karst tourism represents an important opportunity for raising the quality of live in the province. A proposal to adapt non-touristic Heaven’s Cave for tourism was presented to Karst Research Institute ZRC SAZU in 2006. Because the caves are sensitive ecosystems and all activities in them should be carefully implemented, our task was to make basic survey and map the cave, to perform a speleological and touristic research, to propose possible interventions for adapting the cave for tourism and to prepare a strategy for tourism development in this area. The latter should also show us if some interest is present among tourists for new show cave in this region. From this point of view this study does not represent systematic long-term approach for adapting a cave for tourism but rather a short study of a cave with potential to be show cave in remote area of Central Vietnam. Approach used in this study should be used in similar environments as a first step to estimate if weakly known cave is environmentally and economically suitable for development for touristic purposes.

Tower karst and cone karst, 2013, Zhu X. , Zhu D. , Zhang Y. , Lynch E. M.

Cone karst and tower karst are spectacular types of tropical/subtropical karst formed under conditions of intense karstification, and occurring primarily in China, Vietnam, Cuba, Jamaica, Puerto Rico, and Java. The cone-tower karst system is classified into two basic types: fengcong-fenglin karst developed in hard, fissure-porosity rocks, and cockpit-mogotes karst in soft, high primary porosity carbonates. Key factors in the development of cone-tower karst include tropical or subtropical climate with abundant precipitation, tectonic uplift and base-level lowering, relatively pure and thick carbonate lithology, gentle anticline/syncline structures, allogenic input and through rivers. Differentiation into the cone (fengcong/cockpit) or tower (fenglin/mogotes) subtypes is strongly influenced by surface flow and the thickness of the vadose zone. Basic features of cone-tower karst, formation, and global distribution are discussed, with special emphasis on fengcongfenglin karst and the role of point infiltration, linear infiltration, and surface flow. The simultaneous (as opposed to sequential) evolution of fengcong karst and fenglin karst is explained by systematically analyzing the karst development, as well as the formation rate and age of fengcong-fenglin karst

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